Creating a Shadow Orb element for oUF

[lerb]

Hey everyone! Requesting some more of your help I don't know if I'm supposed to post this here or in the actual oUF part of the forum, but I'm gonna give this place a try. It's LUA, after all

What I want to do is rather simple. I want a tracker that tracks a players shadow orbs, shown as 1-3 bars. I have an example here, this is soul shards on my warlock;



I'm using the soulshard-element for oUF to create this, using this code in my layout;

		if LeUI.Class == 'WARLOCK' then
		    self.SoulShards = CreateFrame('Frame', nil, self)
			for i = 1, 3 do
				self.SoulShards[i] = CreateFrame('StatusBar', self:GetName()..'_SoulShards'..i, self)
				self.SoulShards[i]:SetSize(60, 12)
				self.SoulShards[i]:SetStatusBarTexture(LeUI.media.texture)
				self.SoulShards[i]:SetStatusBarColor(LeUI.Classcolor.r, LeUI.Classcolor.g, LeUI.Classcolor.b)
				
				if(i == 1) then
					self.SoulShards[i]:SetPoint('CENTER', UIParent, 'BOTTOM', -70, 96)
				else
					self.SoulShards[i]:SetPoint('TOPLEFT', self.SoulShards[i-1], 'TOPRIGHT', 10, 0)
				end
				
				CreateBorderLight(self.SoulShards[i], LeUI.media.bordersize, LeUI.bordercolor, LeUI.bordercolor, LeUI.bordercolor, 4)
				
				self.SoulShards[i]:SetBackdrop(backdrop)
				self.SoulShards[i]:SetBackdropColor(unpack(LeUI.media.backdropcolor))
			end
		end

Now, I want the exact same thing but for Shadow Orbs when playing priest. I've been looking around but can't find an oUF element for Shadow Orbs, so I thought it wouldn't be so hard to write my own. I guess I was wrong

I thought it wouldn't be harder than to copy the Soulshard element lua-file and basically edit it for Shadow Orbs, but I can't seem to get it to work. Here's the code I ended up with _after_ editing soulshards.lua in oUF elements;

if(select(2, UnitClass('player')) ~= 'PRIEST') then return end

local parent, ns = ...
local oUF = ns.oUF

local SPELL_POWER_SHADOW_ORBS = SPELL_POWER_SHADOW_ORBS
local MAX_SHADOW_ORBS = MAX_SHADOW_ORBS

local Update = function(self, event, unit, powerType)
	if(self.unit ~= unit or (powerType and powerType ~= 'SHADOW_ORBS')) then return end

	local so = self.ShadowOrbs
	if(so.PreUpdate) then so:PreUpdate(unit) end

	local num = UnitPower('player', SPELL_POWER_SHADOW_ORBS)
	for i = 1, MAX_SHADOW_ORBS do
		if(i <= num) then
			so[i]:SetAlpha(1)
		else
			so[i]:SetAlpha(0)
		end
	end

	if(so.PostUpdate) then
		return so:PostUpdate(unit)
	end
end

local Path = function(self, ...)
	return (self.ShadowOrbs.Override or Update) (self, ...)
end

local ForceUpdate = function(element)
	return Path(element.__owner, 'ForceUpdate', element.__owner.unit, 'SHADOW_ORBS')
end

local function Enable(self)
	local so = self.ShadowOrbs
	if(so) then
		so.__owner = self
		so.ForceUpdate = ForceUpdate

		self:RegisterEvent('UNIT_POWER', Path)

		return true
	end
end

local function Disable(self)
	local so = self.ShadowOrbs
	if(so) then
		self:UnregisterEvent('UNIT_POWER', Path)
	end
end

oUF:AddElement('ShadowOrbs', Path, Enable, Disable)

Using this, I end up with this error;

...\LeUI\Modules\Unitframes\oUF\elements\shadoworbs.lua:16: 'for' limit must be a number

I'll have to point out that I'm no more than a rookie to LUA, and this is taking water over my head. But I really hope I can get it working with some help from you guys, like many times before